CVE-2026-102049 Memory corruption in Junos OS
An adjacent attacker can cause a crash or execute root code via LLDP traffic on interfaces with Unified Access Policy enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-102049?
CVE-2026-102049 is a high-severity memory corruption vulnerability in Juniper Networks Junos OS, published on 14 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A Stack-based Buffer Overflow vulnerability in the l2cpd process of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent unauthenticated attacker to cause a denial of service or execute arbitrary code with root privileges via LLDP traffic received on an interface with Unified Access Policy enabled.
Weakness: CWE-121
Which versions are affected by CVE-2026-102049?
How do I fix CVE-2026-102049?
No fix has been published for CVE-2026-102049 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-102049 being exploited?
There is no known exploitation of CVE-2026-102049 in the wild and no public exploit code.
Sources
Also known as GHSA-48w5-95jx-mfhj.